Atlas Copco LT2 User Manual

Instruction book
1 Leading particulars .................................................................................................................................. 5
1.1 General description.............................................................................................................................. 5
1.1.1 Compressor variants..................................................................................................................... 8
1.2 Air flow ................................................................................................................................................. 9
1.2.1 LE/LF2 up to -5, LE7 and LE10 50 Hz (Fig. 1.10)......................................................................... 9
1.2.2 LE10 60 Hz, LE15, -20, LF7, -10 and LT (Fig. 1.11).................................................................... 9
1.3 Regulating system ............................................................................................................................. 12
1.3.1 LE/LF/LT2 up to -7 with DOL starter (Fig. 1.10).......................................................................... 12
1.3.2 LE/LT5 up to -20, LF5 up to -10, each with Y/D starter (Fig. 1.11)............................................. 12
1.3.3 LE/LF/LT Trolley (Fig. 1.12) ........................................................................................................ 13
2 Installation and handling....................................................................................................................... 15
2.1 Dimension drawings........................................................................................................................... 15
2.2 Installation proposals......................................................................................................................... 36
2.2.1 LE/LF/LT...................................................................................................................................... 38
2.2.2 LE/LF/LT Trolley.......................................................................................................................... 39
2.3 Electrical connections........................................................................................................................ 39
2.4 Settings of overload relay - fuses - cable size.................................................................................. 43
2.4.1 Settings of overload relay - fuses of compressors with DOL starter........................................... 43
2.4.2 Settings of overload relay - fuses of compressors with Y-D starter............................................ 44
2.4.3 Cable size.................................................................................................................................... 45
2.5 Pictographs........................................................................................................................................ 46
3 Operating instructions........................................................................................................................... 47
3.1 Initial start-up ..................................................................................................................................... 47
3.2 Starting............................................................................................................................................... 47
3.3 Stopping............................................................................................................................................. 48
3.4 Taking out of operation at end of compressor service life................................................................. 49
4 Maintenance............................................................................................................................................ 50
4.1 Petrol engine maintenance................................................................................................................ 50
4.2 Preventive maintenance schedule of the compressor 1)................................................................... 50
4.3 Lubrication of LE/LT compressors..................................................................................................... 51
4.4 Service kits......................................................................................................................................... 51
5 Servicing and adjustment procedures................................................................................................. 53
5.1 Unloader or check valve .................................................................................................................... 53
5.2 Valves ................................................................................................................................................ 53
5.2.1 Replacement of valve discs (Figs. 5.1 and 5.2).......................................................................... 55
5.3 Air filter............................................................................................................................................... 56
5.4 Adjustment of MDR4S pressure switch (Figs. 5.4 up to 5.6)............................................................. 57
5.5 Adjustment of MDR3 pressure switch (Figs. 5.7 and 5.8) ................................................................. 59
5.6 Adjustment of pilot valve on Trolley (Fig. 5.9) ................................................................................... 60
5.7 Safety valve (SV-Figs. 1.4, 1.6 and 1.8) 1)........................................................................................ 61
5.7.1 Testing on LE/LF/LT.................................................................................................................... 61
5.7.2 Testing on LE/LF/LT Trolley........................................................................................................ 61
5.8 Relief valve (8-Fig. 1.1) on LF7, -10, LE10 up to -20 and LT........................................................... 61
6 Problem solving...................................................................................................................................... 62
7 Principal data.......................................................................................................................................... 64
7.1 Reference conditions......................................................................................................................... 64
7.2 Limitations.......................................................................................................................................... 64
7.3 Compressor data for LE 10 bar ......................................................................................................... 64
7.3.1 50 Hz........................................................................................................................................... 64
7.3.2 60 Hz........................................................................................................................................... 65
7.4 Compressor data for LF 10 bar.......................................................................................................... 66
7.4.1 50 Hz........................................................................................................................................... 66
7.4.2 60 Hz........................................................................................................................................... 66
7.5 Compressor data for LT 15 bar.......................................................................................................... 67
7.5.1 50 Hz........................................................................................................................................... 67
2920 1585 00 - 3 -

Atlas Copco LT2 Specifications

General

Brand	Atlas Copco
Model	LT2
Category	Air Compressor
Language	English